.book {
    margin: 0 auto;

  .outer-book {
    position: relative;
    width: 300px;
    float: left;
    z-index: 1;
    margin: 0px 50px 40px 0;
    -webkit-perspective: 1800px;
    -moz-perspective: 1800px;
    perspective: 1800px;
  }

  .outer-book:last-child {
    margin-right: 0;
  }

  .bk-info {
    position: relative;
    margin-top: 440px;
    display: flex;
    justify-content: space-between;
  }

  .bk-info h3 {
    padding: 25px 0 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.3);
    font-size: 26px;
  }

  .bk-info h3 span:first-child {
    font-size: 14px;
    font-weight: 400;
    text-transform: uppercase;
    padding-bottom: 5px;
    display: block;
    color: #777;
  }

  .bk-info p {
    line-height: 24px;
    color: #444;
    min-height: 160px;
  }

  .bk-info button {
    background: var(--PC);
    border: none;
    color: #fff;
    display: inline-block;
    padding: 3px 15px;
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    cursor: pointer;
    margin-right: 4px;
    box-shadow: 1px 1px 1px rgba(0, 0, 0, 0.15);
  }

  .bk-info button.bk-active,
  .bk-info button:active {
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8), inset 0 -1px 1px rgba(0, 0, 0, 0.2);
  }

  .no-touch .bk-info button:hover,
  .bk-info button.bk-active {
    background: #d06c4e;
  }

  .outer-book .bk-book {
    position: absolute;
    width: 100%;
    height: 400px;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition: -webkit-transform 0.5s;
    -moz-transition: -moz-transform 0.5s;
    transition: transform 0.5s;
  }

  .outer-book .bk-book.bk-bookdefault:hover {
    -webkit-transform: rotate3d(0, 1, 0, 35deg);
    -moz-transform: rotate3d(0, 1, 0, 35deg);
    transform: rotate3d(0, 1, 0, 35deg);
  }

  .outer-book .bk-book > div,
  .outer-book .bk-front > div {
    display: block;
    position: absolute;
  }

  .outer-book .bk-front {
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transform-origin: 0% 50%;
    -moz-transform-origin: 0% 50%;
    transform-origin: 0% 50%;
    -webkit-transition: -webkit-transform 0.5s;
    -moz-transition: -moz-transform 0.5s;
    transition: transform 0.5s;
    -webkit-transform: translate3d(0, 0, 20px);
    -moz-transform: translate3d(0, 0, 20px);
    transform: translate3d(0, 0, 20px);
    z-index: 10;
  }

  .outer-book .bk-front > div {
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    transform-style: preserve-3d;
  }

  .outer-book .bk-page {
    -webkit-transform: translate3d(0, 0, 19px);
    -moz-transform: translate3d(0, 0, 19px);
    transform: translate3d(0, 0, 19px);
    display: none;
    width: 295px;
    height: 390px;
    top: 5px;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
    z-index: 9;
  }

  .outer-book .bk-front,
  .outer-book .bk-back,
  .outer-book .bk-front > div {
    width: 300px;
    height: 400px;
  }

  .outer-book .bk-left,
  .outer-book .bk-right {
    width: 40px;
    left: -20px;
  }

  .outer-book .bk-top,
  .outer-book .bk-bottom {
    width: 295px;
    height: 40px;
    top: -15px;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
  }

  .outer-book .bk-back {
    -webkit-transform: rotate3d(0, 1, 0, -180deg) translate3d(0, 0, 20px);
    -moz-transform: rotate3d(0, 1, 0, -180deg) translate3d(0, 0, 20px);
    transform: rotate3d(0, 1, 0, -180deg) translate3d(0, 0, 20px);
    box-shadow: 10px 10px 30px rgba(0, 0, 0, 0.3);
    border-radius: 3px 0 0 3px;
  }

  .outer-book .bk-cover-back {
    background-color: #000;
    -webkit-transform: rotate3d(0, 1, 0, -180deg);
    -moz-transform: rotate3d(0, 1, 0, -180deg);
    transform: rotate3d(0, 1, 0, -180deg);
  }

  .outer-book .bk-right {
    height: 390px;
    top: 5px;
    -webkit-transform: rotate3d(0, 1, 0, 90deg) translate3d(0, 0, 295px);
    -moz-transform: rotate3d(0, 1, 0, 90deg) translate3d(0, 0, 295px);
    transform: rotate3d(0, 1, 0, 90deg) translate3d(0, 0, 295px);
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
  }

  .outer-book .bk-left {
    height: 400px;
    -webkit-transform: rotate3d(0, 1, 0, -90deg);
    -moz-transform: rotate3d(0, 1, 0, -90deg);
    transform: rotate3d(0, 1, 0, -90deg);
  }

  .outer-book .bk-top {
    -webkit-transform: rotate3d(1, 0, 0, 90deg);
    -moz-transform: rotate3d(1, 0, 0, 90deg);
    transform: rotate3d(1, 0, 0, 90deg);
  }

  .outer-book .bk-bottom {
    -webkit-transform: rotate3d(1, 0, 0, -90deg) translate3d(0, 0, 390px);
    -moz-transform: rotate3d(1, 0, 0, -90deg) translate3d(0, 0, 390px);
    transform: rotate3d(1, 0, 0, -90deg) translate3d(0, 0, 390px);
  }

  /* Transform classes */

  .outer-book .bk-viewinside .bk-front {
    -webkit-transform: translate3d(0, 0, 20px) rotate3d(0, 1, 0, -160deg);
    -moz-transform: translate3d(0, 0, 20px) rotate3d(0, 1, 0, -160deg);
    transform: translate3d(0, 0, 20px) rotate3d(0, 1, 0, -160deg);
  }

  .outer-book .bk-book.bk-viewinside {
    -webkit-transform: translate3d(0, 0, 150px) rotate3d(0, 1, 0, 0deg);
    -moz-transform: translate3d(0, 0, 150px) rotate3d(0, 1, 0, 0deg);
    transform: translate3d(0, 0, 150px) rotate3d(0, 1, 0, 0deg);
  }

  .outer-book .bk-book.bk-viewback {
    -webkit-transform: translate3d(0, 0, 0px) rotate3d(0, 1, 0, 180deg);
    -moz-transform: translate3d(0, 0, 0px) rotate3d(0, 1, 0, 180deg);
    transform: translate3d(0, 0, 0px) rotate3d(0, 1, 0, 180deg);
  }

  .outer-book .bk-viewback .bk-back {
    z-index: 10;
  }

  /* Main colors and content */

  .outer-book .bk-page,
  .outer-book .bk-right,
  .outer-book .bk-top,
  .outer-book .bk-bottom {
    background-color: #fff;
  }

  .outer-book .bk-front > div {
    border-radius: 0 3px 3px 0;
    box-shadow: inset 4px 0 10px rgba(0, 0, 0, 0.1);
  }

  .outer-book .bk-front:after {
    content: "";
    position: absolute;
    top: 1px;
    bottom: 1px;
    left: -1px;
    width: 1px;
  }

  .outer-book .bk-cover:after,
  .outer-book .bk-back:after {
    content: "";
    position: absolute;
    top: 0;
    left: 10px;
    bottom: 0;
    width: 3px;
    background: rgba(0, 0, 0, 0.06);
    box-shadow: 1px 0 3px rgba(255, 255, 255, 0.2);
  }

  .outer-book .bk-back:after {
    left: auto;
    right: 10px;
  }

  .bk-left h2 {
    width: 400px;
    height: 40px;
    -webkit-transform-origin: 0 0;
    -moz-transform-origin: 0 0;
    transform-origin: 0 0;
    -webkit-transform: rotate(90deg) translateY(-40px);
    -moz-transform: rotate(90deg) translateY(-40px);
    transform: rotate(90deg) translateY(-40px);
  }

  .bk-content {
    position: absolute;
    top: 15px;
    left: 20px;
    bottom: 20px;
    right: 20px;
    padding: 30px;
    overflow: hidden;
    background: #fff;
    opacity: 0;
    pointer-events: none;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-transition: opacity 0.3s ease-in-out;
    -moz-transition: opacity 0.3s ease-in-out;
    transition: opacity 0.3s ease-in-out;
    cursor: default;
  }

  .bk-content-current {
    opacity: 1;
    pointer-events: auto;
  }

  .bk-content p {
    padding: 0 0 10px;
    -webkit-font-smoothing: antialiased;
    color: #000;
    font-size: 13px;
    line-height: 20px;
    text-align: justify;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
  }

  .bk-page nav {
    text-align: center;
    width: 90%;
    display: flex;
    position: relative;
    margin: 0 auto;
    margin-top: 164px;
    z-index: 100;
    justify-content: space-between;
    cursor: pointer;
  }

  .bk-page nav span {
    display: inline-block;
    width: 20px;
    height: 20px;
    color: white;
    background: var(--PC);
    border-radius: 50%;
    line-height: 19px;
  }
  .pagenum {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: lightblue;
    position: absolute;
    text-align: center;
    color: white;
    line-height: 20px;
    bottom: 15px;
    left: 50%;
    margin-left: -10px;
  }

  .book .bk-cover {
    background-repeat: no-repeat;
    background-position: 10px 40px;
  }

  .book .bk-cover h2 {
    position: absolute;
    bottom: 0;
    right: 0;
    left: 0;
    padding: 30px;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.1);
  }

  .book .bk-cover h2 span:first-child,
  .book .bk-left h2 span:first-child {
    text-transform: uppercase;
    font-weight: 400;
    font-size: 13px;
    padding-right: 20px;
  }

  .book .bk-cover h2 span:first-child {
    display: block;
  }

  .book .bk-cover h2 span:last-child,
  .book .bk-left h2 span:last-child {
    font-family: "Big Caslon", "Book Antiqua", "Palatino.outer-booknotype", Georgia, serif;
    font-size: 26px;
  }

  .book .bk-content p {
    font-family: Georgia, Times, "Times New Roman", serif;
  }

  .book .bk-left h2 {
    color: #fff;
    font-size: 15px;
    line-height: 40px;
    padding-right: 10px;
    text-align: right;
  }

  .book .bk-back p {
    color: #fff;
    font-size: 13px;
    padding: 40px;
    text-align: center;
    font-weight: 700;
  }
  .nocontent {
    display: flex;
    height: 100%;
    align-items: center;
    justify-content: center;
    font-size: 30px;
  }
}
